{"id":"vidhyamitra:city-day:rishikesh:1978-05-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1978-05-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1978-05-18","date_display":"May 18, 1978 CE","panchanga":{"method":"Sūrya Siddhānta + Bhāskara-II iterative manda + Kerala-school (Mādhava-Nīlakaṇṭha) evection + variation + annual equation","engine_version":"2.0 (Kerala-school enhanced)","accuracy_note":"Sub-degree on Moon at any Kali-Yuga date (~2-5° residual max)","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1978,"month":5,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2443646.770833,"kali_year":5080,"ahargana":1855181.2708,"sun":{"sidereal_longitude":33.2249,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":156.1427,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":122.9178,"elapsed_within_tithi_degrees":2.9178},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3,"moon_longitude":156.1427,"elapsed_within_degrees":9.476},"yoga":{"number":15,"name":"Vajra","sum_longitude":189.3676},"karana":{"half_tithi_index":20,"name":"Vaṇija"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"sky":{"method":"Sūrya-Siddhāntic Bhāskara-II 4-step iteration with atan2-based śīghra + varying peripheries + lunar latitude","engine_version":"3.0 (Pūrṇa — complete SS implementation)","tradition_sources":"Āryabhaṭīya 499 CE → SS Ch.1-5 Burgess 1860 → Siddhānta-Śiromaṇi Bhāskara II 1150 → Tantrasaṅgraha Nīlakaṇṭha 1501","input":{"year":1978,"month":5,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2443646.770833,"ahargana":1855181.2708,"kali_year":5080,"ayanamsa_lahiri":23.5509,"grahas":{"sun":{"sidereal_longitude":33.20948099999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":154.66438100000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false,"latitude":-0.581},"mars":{"sidereal_longitude":112.65668099999999,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":8.792281000000003,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":72.45358099999999,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":61.90048100000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":120.44068099999998,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":163.5685,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":343.5685,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4},"retrograde":false}},"panchang":{"method":"Sūrya Siddhānta + Bhāskara-II iterative manda + Kerala-school (Mādhava-Nīlakaṇṭha) evection + variation + annual equation","engine_version":"2.0 (Kerala-school enhanced)","accuracy_note":"Sub-degree on Moon at any Kali-Yuga date (~2-5° residual max)","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1978,"month":5,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2443646.770833,"kali_year":5080,"ahargana":1855181.2708,"sun":{"sidereal_longitude":33.2249,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":156.1427,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":122.9178,"elapsed_within_tithi_degrees":2.9178},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3,"moon_longitude":156.1427,"elapsed_within_degrees":9.476},"yoga":{"number":15,"name":"Vajra","sum_longitude":189.3676},"karana":{"half_tithi_index":20,"name":"Vaṇija"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.581,"elongation":122.918},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.581,"opposition_distance":57.082}},"eclipse_window_40days":[]},"city":{"slug":"rishikesh","name":"Ṛṣikeśa","lat":30.0869,"lon":78.2676,"tz_offset_hours":5.5,"state":"Uttarakhand","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"rishikesh","name":"Ṛṣikeśa","lat":30.0869,"lon":78.2676,"tz_offset_hours":5.5,"state":"Uttarakhand","country":"IN","tier":"tirtha"},"sunriseLocal":"05:22","sunsetLocal":"19:05","solarNoonLocal":"12:13","dayLengthHours":13.711687655073408,"dayLengthDisplay":"13 Hours 42 Mins 42 Secs","nightLengthDisplay":"10 Hours 17 Mins 18 Secs","moonriseLocal":"14:15","moonsetLocal":"02:23","rahuKala":{"name":"Rāhu Kāla","start":"13:56","end":"15:39","startHours":13.934634587043014,"endHours":15.648595543927193,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"05:22","end":"07:05","startHours":5.364829802622135,"endHours":7.078790759506312,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:48","end":"10:30","startHours":8.792751716390487,"endHours":10.506712673274663,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:34","end":"09:01","startHours":8.56422358880593,"endHours":9.021279843975044,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:56","end":"06:18","startHours":5.936150121583527,"endHours":6.301795125718818,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:46","end":"12:41","startHours":11.763617374989726,"endHours":12.677729885327954,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:32","end":"04:27","startHours":3.5366047819456807,"endHours":4.450717292283908,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:13","end":"05:22","startHours":4.222189164699351,"endHours":5.364829802622135,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:30","end":"15:25","startHours":14.505954906004408,"endHours":15.420067416342636,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:53","end":"19:17","startHours":18.876517457695545,"endHours":19.276517457695544,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:05","end":"19:39","startHours":19.076517457695545,"endHours":19.647837776656935,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:50","end":"20:35","startHours":18.826517457695545,"endHours":20.576517457695545,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:46","end":"00:41","startHours":23.763617374989728,"endHours":24.677729885327956,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"05:22","end":"07:05","startHours":5.364829802622135,"endHours":7.078790759506312,"quality":"auspicious"},{"name":"Roga","start":"07:05","end":"08:48","startHours":7.078790759506312,"endHours":8.792751716390487,"quality":"inauspicious"},{"name":"Udveg","start":"08:48","end":"10:30","startHours":8.792751716390487,"endHours":10.506712673274663,"quality":"inauspicious"},{"name":"Chala","start":"10:30","end":"12:13","startHours":10.506712673274663,"endHours":12.220673630158839,"quality":"neutral"},{"name":"Labha","start":"12:13","end":"13:56","startHours":12.220673630158839,"endHours":13.934634587043014,"quality":"auspicious"},{"name":"Amṛta","start":"13:56","end":"15:39","startHours":13.934634587043014,"endHours":15.648595543927193,"quality":"auspicious"},{"name":"Kāla","start":"15:39","end":"17:22","startHours":15.648595543927193,"endHours":17.36255650081137,"quality":"inauspicious"},{"name":"Śubha","start":"17:22","end":"19:05","startHours":17.36255650081137,"endHours":19.076517457695545,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"19:05","end":"20:22","startHours":19.076517457695545,"endHours":20.36255650081137,"quality":"auspicious"},{"name":"Kāla","start":"20:22","end":"21:39","startHours":20.36255650081137,"endHours":21.648595543927193,"quality":"inauspicious"},{"name":"Śubha","start":"21:39","end":"22:56","startHours":21.648595543927193,"endHours":22.934634587043018,"quality":"auspicious"},{"name":"Roga","start":"22:56","end":"00:13","startHours":22.934634587043018,"endHours":24.220673630158842,"quality":"inauspicious"},{"name":"Udveg","start":"00:13","end":"01:30","startHours":24.220673630158842,"endHours":25.506712673274663,"quality":"inauspicious"},{"name":"Chala","start":"01:30","end":"02:48","startHours":25.506712673274663,"endHours":26.792751716390487,"quality":"neutral"},{"name":"Labha","start":"02:48","end":"04:05","startHours":26.792751716390487,"endHours":28.07879075950631,"quality":"auspicious"},{"name":"Amṛta","start":"04:05","end":"05:22","startHours":28.07879075950631,"endHours":29.364829802622136,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:22","end":"06:22","startHours":5.364829802622135,"endHours":6.364829802622135,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"06:22","end":"07:22","startHours":6.364829802622135,"endHours":7.364829802622135,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"07:22","end":"08:22","startHours":7.364829802622135,"endHours":8.364829802622136,"planetary_lord":"Moon"},{"name":"Hora 4","start":"08:22","end":"09:22","startHours":8.364829802622136,"endHours":9.364829802622136,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"09:22","end":"10:22","startHours":9.364829802622136,"endHours":10.364829802622136,"planetary_lord":"Venus"},{"name":"Hora 6","start":"10:22","end":"11:22","startHours":10.364829802622136,"endHours":11.364829802622136,"planetary_lord":"Sun"},{"name":"Hora 7","start":"11:22","end":"12:22","startHours":11.364829802622136,"endHours":12.364829802622136,"planetary_lord":"Mars"},{"name":"Hora 8","start":"12:22","end":"13:22","startHours":12.364829802622136,"endHours":13.364829802622136,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"13:22","end":"14:22","startHours":13.364829802622136,"endHours":14.364829802622136,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"14:22","end":"15:22","startHours":14.364829802622136,"endHours":15.364829802622136,"planetary_lord":"Moon"},{"name":"Hora 11","start":"15:22","end":"16:22","startHours":15.364829802622136,"endHours":16.364829802622136,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"16:22","end":"17:22","startHours":16.364829802622136,"endHours":17.364829802622136,"planetary_lord":"Venus"},{"name":"Hora 13","start":"17:22","end":"18:22","startHours":17.364829802622136,"endHours":18.364829802622136,"planetary_lord":"Sun"},{"name":"Hora 14","start":"18:22","end":"19:22","startHours":18.364829802622136,"endHours":19.364829802622136,"planetary_lord":"Mars"},{"name":"Hora 15","start":"19:22","end":"20:22","startHours":19.364829802622136,"endHours":20.364829802622136,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"20:22","end":"21:22","startHours":20.364829802622136,"endHours":21.364829802622136,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"21:22","end":"22:22","startHours":21.364829802622136,"endHours":22.364829802622136,"planetary_lord":"Moon"},{"name":"Hora 18","start":"22:22","end":"23:22","startHours":22.364829802622136,"endHours":23.364829802622136,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"23:22","end":"00:22","startHours":23.364829802622136,"endHours":24.364829802622136,"planetary_lord":"Venus"},{"name":"Hora 20","start":"00:22","end":"01:22","startHours":24.364829802622136,"endHours":25.364829802622136,"planetary_lord":"Sun"},{"name":"Hora 21","start":"01:22","end":"02:22","startHours":25.364829802622136,"endHours":26.364829802622136,"planetary_lord":"Mars"},{"name":"Hora 22","start":"02:22","end":"03:22","startHours":26.364829802622136,"endHours":27.364829802622136,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"03:22","end":"04:22","startHours":27.364829802622136,"endHours":28.364829802622136,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"04:22","end":"05:22","startHours":28.364829802622136,"endHours":29.364829802622136,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"North-West","rahuVasa":"North-West","anandadiYoga":{"name":"Dhātṛ","quality":"Auspicious"},"drikRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":19.43016405385581,"eotMinutes":3.6891821904695723,"ayanamsa":23.5509}},"calendars":{"vikram_samvat":2035,"vikram_samvatsara":"Prajāpati","saka_samvat":1900,"saka_samvatsara":"Kālayukta","bengali_samvat":1385,"malayalam_era":1154,"nanakshahi_year":509,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Śukla Pakṣa","solar_month":"Vṛṣabha (Vaikāsi)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Śukla Ekādaśī · Vikram 2035 Prajāpati · Śaka 1900 Kālayukta"},"festivals":[{"id":"nirjala-ekadashi","name":"Nirjalā Ekādaśī","name_sanskrit":"निर्जला एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Strictest Ekādaśī (no water for 24 hours); Bhīma's vrata. Confers fruit of all 24 Ekādaśīs.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Jyeṣṭha"},"precedence":1,"sources":["Mahābhārata, Anuśāsana Parva"]},{"id":"ekadashi","name":"Ekādaśī","name_sanskrit":"एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Sacred to Bhagavān Viṣṇu; vrata for purification.","vrata":true,"detection":{"any_of":[{"tithi_number":11},{"tithi_number":26}]},"precedence":5},{"id":"vrishabha-sankranti","name":"Vṛṣabha Saṅkrānti","name_sanskrit":"वृषभ सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Taurus.","vrata":false,"detection":{"sun_rashi":"Vṛṣabha"},"precedence":5}],"todays_walk":{"walk":{"id":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"rishikesh"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga May 18, 1978 CE · Ṛṣikeśa · Vidhyamitra","description":"May 18, 1978 CE for Ṛṣikeśa: Śukla Ekādaśī, sūryodaya 05:22, sūryāsta 19:05.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1978-05-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1978-05-18","sa":"https://sa.vidhyamitra.com/city/rishikesh/1978-05-18","hi":"https://hi.vidhyamitra.com/city/rishikesh/1978-05-18","x-default":"https://vidhyamitra.com/city/rishikesh/1978-05-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-19T08:43:12.949Z","verification":{"type":"multi-marker","confidence":"canonical"}},{"pillar":"Vidhyamitra-Tier2","pillar_version":"0.1.0","method":"Spherical astronomy + Lahiri ayanamsa + standard solar declination + EoT correction","retrieved_at":"2026-05-19T08:43:12.949Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-19T08:43:12.949Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}